Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Wiring diagram for a 3 valve s plan plus heating system

Hi .. I'm trying to wire up a heating system with 3 valves and two Horstmann wireless thermostats using a honeywell 10 way wiring centre. 
I assume that for the room stat I should wire for 230v application and for the zoned stat it should be volt free but I am uncertain as to which terminals go from the thermostats to where on the wiring system.
can anyone help

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4 Suggested Answers

Therinnaiguy
  • 1420 Answers

SOURCE: installing new furnace with two zones

You will need a control to operate motorized zone dampers. In the ductwork, you will install a damper in each line going into the area you want zoned. If you have air conditioning you will also require a barometric relief damper that allows air to pass thru the ductwork and not restrict air over your A/C coil. Common controls are made by Honeywell and EWC.

If you already have the control module, you will run two or three (low voltage) wires from each motorized damper back to the control. Your thermostat wires (also low voltage) will run from each thermostat to the control module and connect to a zone relay. Match each zone by number. You will need to run power to the control module that will provide power to the thermostats as well as the motorized damper. Check on the reverse side of the control module and/or check on the web to find the wiring diagram.

Posted on Nov 21, 2008

rickzilla
  • 706 Answers

SOURCE: wiring honeywell digital stat

Hello davem1952,
The way you wire it will depend on how the other end of your three wires are wired into your heating system. This link http://www51.honeywell.com/pacific/common/documents/DT200_Specifications.pdf
shows the various methods for wiring it and take into account the type of setup you are dealing with. You'll need to find the wiring detail ( last page) that corresponds to your setup..
Hope this helps..
Reagrds,
Rick

Posted on Dec 13, 2008

  • 5 Answers

SOURCE: Replacing Round Honewell Mercury Thermostat

try to get one that is made for oil heat, the installation is easy only two wires, and the instructions make it easy.

Posted on Apr 26, 2009

  • 16 Answers

SOURCE: cannot get central heating working,for honeywell ST6400 programme

with y plan 3 connections on programmer HW on HW off CH on HW on to cylinder stat then HW call to Orange on Mvalve to power boiler and pump HW off to grey wire on Mvalve to close hot water CH to room stat common then heating call to white on Mvalve

Posted on Aug 17, 2009

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